Drilling-machine



2 Sheets-Sheet 1.

(No Model.)

I P. H. RIe'HARDe DRILLING MACHINE.

Patented Mer. 4, 1890.

im SI TALI-IMM.

N. PiTEHsPhnlo-Limngmphar. washington, D. (L

(Nomoagl.) l y z'sheets-sheen 2. F. H. RICHARDS. DRLIyI-BTG4 MACHINE.

No. 422,540. Patented Mar. 4, 1890.

VUNITED STATES PATENT OFFICE."

FRANcIS H. RICHARDS, oF HARTFORD, coNNEorIcUfnAssIcNoR To EcKLEY B. coXE, oF DRIFToN,A PENNSYLVANIA.

DRILLlNc-MACHINE,

SPECIFICATIONforrnngvpart ofkLetters Patent No. 422,540, dated March 4, 1890. Application sied December a, Issay serai No. 292,844, (N moar-.1.2

. To all whom t may concern: the screw 12 iits withinthe cap 15, which is Be it known that I, FRANCIS H. RICHARDS, screwedto theslide to furnish abearing therea citizen of the United States, residing at for. This furnishes the required means for Hartford, in the county of Hartford and State :adjusting the table T tao the required height 55 of Connecticut, have invented certain new underneath the drills. In practice a handand useful Improvements in Drilling -Ma- V,lever 16 is sometimes affixed to the pivot-shaft chines, of which the following is a'speciica- 8 and may be used in conjunction with Oras tion. 1 a substitute for the said treadle.

This invention relates to that class of mul- In the upper part of the frame-work bear- 6o Io tiple drilling-machines in which the drills ings 19 and 21, Fig. 1, are ,provided for the 4 j are operated by means of a gyratory drivingcrank-shafts 2O and 22, and other bearings 23 plate; and the object of my present improveand for a driving-shaft 24; also, a projectments is to furnish a machine of that class ing beam 26 reaches out to carry a support 27 especially adapted to drive small drills at a for the jig-plate or drill-carrying plate 30. 65 I5 comparatively high speed, and to be used for The shaft 24 couples and drives the crankjig-work, as required in the manufacture shafts 2O and 22 through the similar pairs of f of sewing-machines, iire-arms, and other argears 3l 32 and 33 34,'respectively, and has ticles generally,manufactured by the intera pulley 35,whereby power is applied to drive changeable method. the machinei The cranks 40 42 on the shafts 7o 2o In the drawings accompanying and form- 2O 22, respectively, are of substantially the ing a part of this specification, Figure 1 is a same radiiV and are driven in the 'same direcside elevation, partially'in section, of a mation. These cranks are set one rearward, in chine embodying my improvements. Fig. 2 the machine, of the other, and together carry is a front elevation of the same. Fig. 3 is a the driving-bar 50. In order to secure smooth- V75 2 5 plan or top view of the machine. Fig. 4 is a ness of operation without excessively line tithorizontal section through the cranks and ting, the crank 40 is journaled directly in said4 above the driving-bar. Fig. 5 is a horizontal bar and the crank 42 indirectly, this latter section in line a a, Fig. l. crank being provided vwith a box 5l, which Similar characters designate like parts in slides in the slot 52, formed in said bar to ac- 8o 3o all the iigures. commodate any inequality existing In the ra- The frame-work of my improved drillingdiusor rotary movement of the cranks. Such machine consists of some suitable column A, variations it is obviousmay arise from dewhich carries the drilling mechanismand has fective workmanshipVY in the cranks themdevices for supporting the table Il on which selves or' in the gears described, or from tor- 8 5 to place the pieces to be drilled. These desion of any of the shaftsconnected by said vces consist, as shown in the drawings, of a gears. The forward crank 40 I call the vertical slide S, carried in a movable frame driving-crank and the rearward crank 42 B, which is iixed upon the front of column the guide-crank. The bifurcated rear end A by bolts 2, whose heads 3 lie Within the T- of the bar 50 I usually connect by a tie-bolt 9o 4o slot 4 in said column. vThe column A is or 54 to prevent the springing of the same.

may be formed hollow to contain the treadle- Below the cranks 40 42 the shafts 20 22 rod 5, operated by the treadle D, pivoted in have other cranks 60 G2, oppositely disposed the column at 6. At its upper end rod 5 conto said cranks 40 42, respectively, and on nects at 7 to the rear end of the lever L,which which is carried a counterbalancing bar or 9 5 45 is pivoted at 8 to the sliding head B, and has weight 63, for steadying the machine against at its forward end a segment 9, that engages the disturbing momentum of the bar 50. The with the rack-teeth 11 on the sliding nut 10, counter -balance is or may be connected to lying within the main slide S. The nut lO its said cranks by the same Inode of conis moved in the slide S by means of the adstruction as above described for the driving. Ion

5o justing-screw 12, operated by thehand-whcel bar 50.

13 on the lower end thereof. A collar 14 on The front part 50 of the driving-bar 50 is fitted to carry the driving-plate 65, which is attached to said bar by screws G6, orby other Well-known means. This plate has holes in which turn the crank-pins 70 of the cranks 7,2 of the drill-spindles 7 5, which spindles are carried in the sockets S0, that are xed in said jig-plate 30. The particular construction of the said spindles and sockets, as shown in the drawings, is more fully described in my'application, Serial No. Qllel; but modifications of these parts may be resorted to without departing from my present invention. The jig-plate is secured to the framework by suitable means-Mas, for instance, the shelf or ledge S1 and screws 82.

In preparing to use the machine for the drilling of any particular piece, of course it is ii rst necessary to provide a jig-plate having holes corresponding in distances apart and arrangement to the holes to be drilled and to provide a corresponding driver-plate. The vertical support 27, Fig. l, I attach to the under side ot the beam 2G by a bolt 67, whose head fits in a T-slot in the under side of said beam, whereby the support may be adjusted longitudinally of ,the beam to accommodate different sizes of jigplates- The lower end of said support or brace may be screwed directly to the said plate 30 by a nut G0, as herein shown.

It is frequently necessary in this class of multiple drilling-machines to use drills of various sizes in the same machine at the saine time and to set the drills at various distances apart, as required by the positions of the holes in the articles to be drilled. In this machine all such arrangements and' constructional adjustments are very readily made, it only being' necessary to provide a drill-carrying plate and a driving-plate of the required dimensions to carry the desired sizes and arrangement of drills.

Having thus described my invention, I claim l. In a drillingmachine, the combination, with a fraine\\o1'k, ol' a main crank, a lguide crank, a driving-bar journaled on the main crank and guided by the guide-crank, and a counter-balance carried on cranks oppositely disposed to said driving-bar cranks, substantially as described.

2. In a drilling-machine, the combination, with a frame- Work, of the jig-plate fixed thereto and carrying drills provided with cranks, a pair of cranks located one rearward of the other and similarly actuated, a driving bar carried by said cranks, and the driving plate alx'cd to the forward end of said drivn ing-bar and engaging said drill-cranks, all substantially as described.

3. In a drillingmachine, the combination, with aframe-Work, substantially as described, having the projecting beam 26, of the similarly-actuated crank-shafts journaled in said frame-Work and ycarrying the drivingqilatc, thej ig-plate carrying the drills, having cranks engaging said driving-plate, and the adjustable support connecting the forward part of said jig-plate to said beam, all substantially as described.

4. In a drilling-machine, the combination, with the shafts 2O and 22, having cranks 4.0 and 42, of the drivin glbar 50, journaled on one crank, and provided with the bearing 5l, movable therein and journaled on the other crank, substantially as described.

In a drilling-machine, the combination, with the vertical column provided with a trcadle and treadle-rod, of the bracket adjustable on said column and carrying the tablesupporting slide, the sliding nut adjustable within said slide by means substantially described, and the lever pivoted in said bracket, connected to be actuated from said treadle-rod and having a segment engaging the rack on said nut, all substantially as shown and described.

FRANCIS II. RICHARDS.

Witnesses:

SAML. W. Povvnn, HENRY L. RECKARD. 

